63401570621551 has 2 divisors, whose sum is σ = 63401570621552. Its totient is φ = 63401570621550.

The previous prime is 63401570621503. The next prime is 63401570621563. The reversal of 63401570621551 is 15512607510436.

63401570621551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63401570621551 - 2²⁵ = 63401537067119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63401570621591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31700785310775 + 31700785310776.

It is an arithmetic number, because the mean of its divisors is an integer number (31700785310776).

Almost surely, 2^{63401570621551} is an apocalyptic number.

63401570621551 is a deficient number, since it is larger than the sum of its proper divisors (1).

63401570621551 is an equidigital number, since it uses as much as digits as its factorization.

63401570621551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756000, while the sum is 46.

The spelling of 63401570621551 in words is "sixty-three trillion, four hundred one billion, five hundred seventy million, six hundred twenty-one thousand, five hundred fifty-one".